CAJ | 학술논문

用Al、B取代Ti_(50)M1i_(15)Cu_(25)Sn_3Be_4中有毒的Be元素,采用真空甩带及铜模吸铸法制备名义成分为Ti_(50)M1i_(15)Cu_(25)-Sn_3Al_(6.9)Be_(0.1)的非晶合金.对制得的合金经热处理制备准纳米晶体.采用SEM观察组织及晶粒大小.XRD分析结果表明,铜模吸铸法所制得的合金为晶态加少量非晶.DTA分析表明,合金存在三个相变转变点,转变温度分别为Te-1=350℃、Te_2=430℃和Te_3=510℃.合金经800℃油淬10 min、350℃回火12 h后晶粒细化,晶粒尺寸在1μm以下,其中析出相的晶粒尺寸已是准纳米级或纳米级尺度.回火24h后晶粒明显长大,晶粒平均尺寸在10μm左右.
용Al、B취대Ti_(50)M1i_(15)Cu_(25)Sn_3Be_4중유독적Be원소,채용진공솔대급동모흡주법제비명의성분위Ti_(50)M1i_(15)Cu_(25)-Sn_3Al_(6.9)Be_(0.1)적비정합금.대제득적합금경열처리제비준납미정체.채용SEM관찰조직급정립대소.XRD분석결과표명,동모흡주법소제득적합금위정태가소량비정.DTA분석표명,합금존재삼개상변전변점,전변온도분별위Te-1=350℃、Te_2=430℃화Te_3=510℃.합금경800℃유쉬10 min、350℃회화12 h후정립세화,정립척촌재1μm이하,기중석출상적정립척촌이시준납미급혹납미급척도.회화24h후정립명현장대,정립평균척촌재10μm좌우.
Be element in Ti_(50)M1i_(15)Cu_(25)Sn_3Be_4 was replaced with Al and B to prepare Ti_(50)M1i_(15)Cu_(25)Sn_3Al_(6.9)Be_(0.1) amorphous alloy by melt-spining, copper suction casting, and then to prepare quasi nano-crystal with the amorphous alloy by heat treatment. SEM was used to observe microstructure and grain size. The XRD analysis shows that the sample prepared by copper suction casting includes crystal and little amorphous. The DTA analysis shows that there are three phase transition points, the transition temperature is that Te_1=350℃,Te_2=430℃, Te_3=510℃ The average grain size of the alloy reduces to below 1 μm after oil quenching at 800℃×l0 min and tempering at 350 ℃×12 h, while the grain growth is observed after tempering at 350℃×24 h, the average grain size is about 10 μm.